Source : Webster's Revised Unabridged Dictionary (1913)

Waddle \Wad"dle\, v. i. [imp. & p. p. {Waddled}; p. pr. & vb. n.
   {Waddling}.] [Freq. of wade; cf. AS. w[ae]dlian to beg, from
   wadan to go. See {Wade}.]
   To walk with short steps, swaying the body from one side to
   the other, like a duck or very fat person; to move clumsily
   and totteringly along; to toddle; to stumble; as, a child
   waddles when he begins to walk; a goose waddles. --Shak.

         She drawls her words, and waddles in her pace. --Young.